Tissue Repair Slows in Old Age. These Proteins Speed It Back Up
UCSF scientists engineered old fibroblast cells to turn their genes on and off in the same way as young fibroblasts. The old fibroblasts were rejuvenated: they multiplied (green) and produced more of the material used to make the "skeletons," or extracellular matrix, of our organs (red). Image by Li Lab